Automatic safety appliance for railway-cars.



w! L: AUTOMATIC SAFETY APPLIANCE FOB RAILWAY CABS.

APPLIOA1'IOH FILED BEPT 8, 1911.

1,026,766.- PatentedMay21, 1912.

I 1 WITNESSES INVENTOR W. L. POOLE.

AUTOMATIC SAFETY APPLIANCE FOR RAILWAY CARS.

I APPLICATION FILED SEPT. 8, 1911. v Patented May 21, 1912.

2 .SHBBTS-SSHEET 2.

W1 TNE SSE 5 11V" VEN T 01? r f f A llorm UNITED STATES PATENT oFFIoE.

WALTER L. POOLE, 0F COVINGTON, VIRGINIA, ASSIGNOR OF ONE-HALF MEDWEDEFF,0F BALTIMORE, MIARYLAND.

mo mutton AUTOMATIC SAFETY APPLIANCE FOR RAILWAYfCARS.

specification of Letter-s Patent.

I Patented May 21, rate.

Application filed September 8, 1911. Serial No. 648,340.

To all whom it may concern:

Be it known that I. WALTER L. Poona, a citizen of the United States,residing at Covington. in the county of Alleghany and Qtate of Virginia.have invented certain new and useful Improvements in Automatic SafetyAppliances for Railway-Cars, of which the following is a specification.

This invention relates to automatic safety appliances for railway carsand the like, and has for its object to provide a device which willoperate to release the pressure in the train line pipe to set the brakesin case of derailment of any car in the train.

Another object is to provide means for preventing the device beingoperated other than by actual'derailment of the truck.

It is also designed. to provide a simple and inexpensive device whichmay be readily applied to existing rolling stock of all kinds now inuniversal use.

With these and other objects in view, the present invention consists inthe combination and arrangement of the several parts whiclrwill behereinafter more fully described, shown in the accompanying drawings andpointed out in the appended claims, it being understood that changes inthe form. position. size and arrangement of the several parts describedmay be made within the scope of the claims without departing from thespirit or sacrificing any of the-advantages of the invention.

' Reference being had to the accompanying drawings forming part of thisspecification, Figure 1 is a view in side elevation of aportion of a carwith the invention applied thereto: Fig. 2 is a'similar view with theparts in the position assumed upon derailment of the truck; Fig. 3 isatransverse sectional view of the same; Fig. at is a plan view ofthedevice, parts being in section; 5 is a transverse'sectional view of aslightly modified form, and Fig. 6. is an elevationof the same.

Similar characters ofreference designate corresponding parts in all-thefigures of the drawings. V

Secured to the floor frame of a car indicated A, and projectingdownwardly at either side .of the car are hangers or brackets 1, thelower end of. each terminating in a bearing 2, for the reception of atrunnion 3 formed on the end of a transversely extendof the t appetportions 6 of the bard.

that might be-encountered between the rails.

A release valve 7 is connected to the train line pipe at the properplace above the bar 4, and is normally closed to the atmosphere. so thatit does not affect the train line pressure until operated to open to'theatmosphere as will presently appear.

Pivotally connected to the lever 8 for operating the valve 7 is a rod9.- the lower end of which is piv'otally connected to one A bracket 10is fixed tothe floor frame A of the car, and the rod 9'is slidablymounted in this bracket. said rod having fixed thereon a collar 11. anda helical tension spring 12 encircles the rod and is interposed betweenthe bracket- 10 and the collar 11, it being intended that saidspringshall exert sufficient pressure downwardly on the bar 4: toprevent the same being operated other than by the derailment of the car.Should thewheels of a truck leave the rails as shown in Fig. 2. thetappet will engage the rail. and through the rod 9 operate on the valve7 to open same to the atmosphere and thus apply the brakes in the mannerwell known, the weight of the car bein such as to cause the spring 12 tobe further. comit angles to form tappet or pressed. llhen the car isrestored upon the I rails. the excess compression of the spring 1:2occasioned by the derailment of the car is released. and the springautomatically returns the valve to normal position. i

y In Figs; 5 and 6 is shown a modified form in which the tappetsindicated 13 arearranged over each rail, :1 rod 14 being slid ablymounted in a guide 15, and is connected at its upper endto the operatinglever of a release valve 16 located in, a branch plpe 1'? from the trainline pipe. A

helical tension spring encircles the rod let and has one end fast to thevalve lever and its other end secured to ahfixed support 19 dependingfrom the car frame. this spring will therefore prevent the valve being0perated except by the weight of the car when derailed.

I Having fully described the invention,

what is claimed as new and desired to secure by Letters Patent, is;

. railed,- a release valveconnected with the train line pipe ofjan airbrake system, means foroperably connecting the valve with the tappets,and means for returning .the valve to normal position after derailment.

2. In 'a'. deviqebf the character described comprising a bracketsupported by a car,

a push rod slidably mounted in said bracket,

altappetcarried by said push rod, a releasevalve operably connected withthe train line pipe of anair'brake system, the push rod adapted to beactuated by the derailment of said car, and flexible means forpreventlng actuatlon of said valve other than by derailment of said car,

,"3. Ina'devicc of the characterdescribed comprising a bracket supportedby a car, apush rod slidably a t'appet carried by said push'rod, arelease comprising a brake system,

.fiexible means for mounted in said bracket,

valve operably connectedwiththe train line pipe of an air brake system,the said push rod adapted to be actuated by the derailme'nt of the car,ing actuation of said valve other than"b'y derailment of the car, andmeans for returning said Yalve to normal-position after derailment.

v 4:. .In a device'of the characterdescribed,

plurality of brackets supported'by a car, push rods slidably mounted insaid brackets,' t'appets carried by said pushrods, a" release valveoperably' connected with-the train line pipeof-anlair the said-push rodsadapted to be actuated by the derailment of the car,

said valve, other than by derailment .-fof-the car, and means forreturning said valve'to normal position after derailment.

In testimony whereof I aflixmy signature in presence of two witnesses. I

WALTER Ln POOLE. Witnesses: ANNIE ARRrrr,

M. .D; MILLER.

flexible means for preventpreventing actuation of I

